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  <title>Get the next field name</title>
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  <div id="layout-content"><div id="function.fdf-next-field-name" class="refentry">
 <div class="refnamediv">
  <h1 class="refname">fdf_next_field_name</h1>
  <p class="verinfo">(PHP 4, PHP 5, PHP 7)</p><p class="refpurpose"><span class="refname">fdf_next_field_name</span> &mdash; <span class="dc-title">Get the next field name</span></p>

 </div>
 
 <div class="refsect1 description" id="refsect1-function.fdf-next-field-name-description">
  <h3 class="title">说明</h3>
  <div class="methodsynopsis dc-description">
   <span class="methodname"><strong>fdf_next_field_name</strong></span>
    ( <span class="methodparam"><span class="type">resource</span> <code class="parameter">$fdf_document</code></span>
   [, <span class="methodparam"><span class="type">string</span> <code class="parameter">$fieldname</code></span>
  ] ) : <span class="type">string</span></div>

  <p class="para rdfs-comment">
   Gets the name of the field after the given field. This name can be used
   with several functions.
  </p>
 </div>


 <div class="refsect1 parameters" id="refsect1-function.fdf-next-field-name-parameters">
  <h3 class="title">参数</h3>
  <p class="para">
   <dl>

    
     <dt>
<code class="parameter">fdf_document</code></dt>

     <dd>

      <p class="para">
       The FDF document handle, returned by <span class="function"><a href="fdf_create.html" class="function">fdf_create()</a></span>,
       <span class="function"><a href="fdf_open.html" class="function">fdf_open()</a></span> or <span class="function"><a href="fdf_open_string.html" class="function">fdf_open_string()</a></span>.
      </p>
     </dd>

    
    
     <dt>
<code class="parameter">fieldname</code></dt>

     <dd>

      <p class="para">
       Name of the FDF field, as a string. If not given, the first field will
       be assumed.
      </p>
     </dd>

    
   </dl>

  </p>
 </div>


 <div class="refsect1 returnvalues" id="refsect1-function.fdf-next-field-name-returnvalues">
  <h3 class="title">返回值</h3>
  <p class="para">
   Returns the field name as a string.
  </p>
 </div>


 <div class="refsect1 examples" id="refsect1-function.fdf-next-field-name-examples">
  <h3 class="title">范例</h3>
  <p class="para">
   <div class="example" id="example-4152">
    <p><strong>Example #1 Detecting all fieldnames in a FDF</strong></p>
    <div class="example-contents">
<div class="phpcode"><pre><span style="color: #000000">
<span style="color: #0000BB">&lt;?php<br />$fdf&nbsp;</span><span style="color: #007700">=&nbsp;</span><span style="color: #0000BB">fdf_open</span><span style="color: #007700">(</span><span style="color: #0000BB">$HTTP_FDF_DATA</span><span style="color: #007700">);<br />for&nbsp;(</span><span style="color: #0000BB">$field&nbsp;</span><span style="color: #007700">=&nbsp;</span><span style="color: #0000BB">fdf_next_field_name</span><span style="color: #007700">(</span><span style="color: #0000BB">$fdf</span><span style="color: #007700">);<br />&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="color: #0000BB">$field&nbsp;</span><span style="color: #007700">!=&nbsp;</span><span style="color: #DD0000">""</span><span style="color: #007700">;<br />&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="color: #0000BB">$field&nbsp;</span><span style="color: #007700">=&nbsp;</span><span style="color: #0000BB">fdf_next_field_name</span><span style="color: #007700">(</span><span style="color: #0000BB">$fdf</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">$field</span><span style="color: #007700">))&nbsp;{<br />&nbsp;&nbsp;&nbsp;&nbsp;echo&nbsp;</span><span style="color: #DD0000">"field:&nbsp;</span><span style="color: #0000BB">$field</span><span style="color: #DD0000">\n"</span><span style="color: #007700">;<br />}<br /></span><span style="color: #0000BB">?&gt;</span>
</span>
</pre></div>
    </div>

   </div>
  </p>
 </div>


 <div class="refsect1 seealso" id="refsect1-function.fdf-next-field-name-seealso">
  <h3 class="title">参见</h3>
  <p class="para">
   <ul class="simplelist">
    <li class="member"><span class="function"><a href="fdf_get_value.html" class="function" rel="rdfs-seeAlso">fdf_get_value()</a> - Get the value of a field</span></li>
   </ul>
  </p>
 </div>


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